Using squeezed field to preserve two-atom entanglement against spontaneous emissions

Details Using squeezed field to preserve two-atom entanglement against spontaneous emissions Using squeezed field to preserve two-atom entanglement against spontaneous emissions

2008-07-07

arxiv.org/abs/0807.0965v2

J. Phys. A: Math. Theor., 42: 035304 (2009)

Physics

Quantum Physics

5 figures

Scientific paper

10.1088/1751-8113/42/3/035304

Tunable interaction between two atoms in a cavity is realized by interacting the two atoms with an extra controllable single-mode squeezed field. Such a controllable interaction can be further used to control entanglement between the two atoms against amplitude damping decoherence caused by spontaneous emissions. For the independent amplitude damping decoherence channel, entanglement will be lost completely without controls, while it can be partially preserved by the proposed strategy. For the collective amplitude damping decoherence channel, our strategy can enhance the entanglement compared with the uncontrolled case when the entanglement of the uncontrolled stationary state is not too large.

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